An hour on Safari content blockers... and iMore

Safari content blocker extensions, which provide the ability to selectively prevent code from loading on websites, were previewed at WWDC 2015 as part of the developer sessions. Though they have many potential uses, the most obvious is for creating ad-blocker plugins for the iPhone and iPad. Rather than targeting ads, however, what Apple seems to be targeting here is all the JavaScript code that typically comes with ads and slows down performance.